* {
    padding: 0;
    margin: 0;
}

ul,
ol {
    list-style: none;
}

a {
    text-decoration: none;
}

.header {
    position: fixed;
    width: 100%;
    min-width: 1300px;
    height: 105px;
    background-color: rgba(0, 0, 0, 0);
    color: white;
    z-index: 999;
}

.header .all {
    width: 1300px;
    height: 105px;
    margin: 0 auto;
}

.header .all .left {
    float: left;
    margin-left: 30px;
}

.header .all .left img {
    padding: 15px 20px;
    height: 75px;
    float: left;
}

.header .all .right {
    float: right;
}

.header .all .right ul {
    margin-right: 50px;
}

.header .all .right ul li {
    height: 105px;
    box-sizing: border-box;
    float: left;
    text-align: center;
    padding: 0 30px;
    font-size: 18px;
    line-height: 105px;
}

.header .all .right ul li a {
    color: black;
}

.header .all .right ul li:hover {
    border-bottom: 4px solid #1677ff;
}